Plate boring device



Oct. 31, 1961 J. G. BROUSSARD PLATE BORING DEVICE 2 Sheets-Sheet 1 Filed Aug. 4, 1959 (/0/7/7 6. Brow-Java INVENTOR. M @Z/ ATTORNEY Oct. 31, 1961 J. G. BROUSSARD 3,006,223

PLATE BORING DEVICE Filed Aug. 4, 1959 2 Sheets-Sheet 2 m M NH W T 74 T. u w m A G. n Y M B 6 fim/M a x v United States Patent ce 3,006,223 PLATE BORDIG DEVICE John G. Broussard, P.0. Drawer 370, Edna, Tex. Filed Aug. 4, 1959, Ser. No. 831,575 4 Claims. (Cl. 7762) This invention relates to new and useful improvements in a plate boring device.

It is an object of this invention to provide a means for boring holes in building plates ditficult to reach with ordinary drilling tools.

It is another object of the invention to provide means for drilling holes in plates of building structures having novel means for maintaining the tool in position during drilling operations.

It is still a further object of the invention to provide a means for drilling holes in plates of buildings having novel means for adjusting the tool for drilling at various angles.

In installing electrical conduits in buildings already constructed, it is customary to bring the conduit into the upper portion, or attic, of the structure by passing the conduit between the walls of the building and up through the plate adjacent the roof structure. The space available for Working in this area is very restricted and it is often difficult to position a drill in this area at the desired angle in order to drill through the plate. Flexible cables have been employed to permit the drill bit to be positioned in the restricted area, but Without means for maintaining the drill bit at this angle, it is very difiicult to obtain the desired angle of perforation. It is an object of this invention to provide means for accomplishing such an operation having novel holding means and a novel bit and guide as well as a novel means for varying the angle of perforation in accordance with the need.

With the above and other objects in view, the invention has relation to certain novel features of construction, operation and arrangement of parts more particularly defined in the following specification and illustrated in the accompanying drawings, wherein:

FIGURE 1 is a top perspective view of the device with a drill attached in dotted lines.

FIGURE 2 is an end elevational view showing the device applied to a building structure.

FIGURE 3 is an end elevational view of the device applied to a building structure at another angle.

FIGURE 4 is an enlarged side elevational view, in cross section, showing the bit guide and holder.

FIGURE 5 is a top plan view taken on the line 5-5 of FIGURE 4.

FIGURE 6 is a cross sectional elevational view of the cable guide, and

FIGURE 7 is a cross sectional elevational view of the holder spike and extension.

Referring now more particularly to the drawings, the numeral 1 designates a platform having prongs 2, 2 on the bottom thereof for engagement by penetration into the building plate as 3. A pair of rigid supports 4, 4 are mounted on the platform 1 having longitudinal slots 5, '5 in which the bracket 6 is adjustably mounted by means of the bolts 7, 7. An annular member 8 is mounted in the bracket 6 and has internally threaded sockets into which the ends of the bolts 7, 7 extend to lock the bracket 6 and member 8 together. The member 8 is internally threaded axially to receive the externally threaded insert 9 which has the axial passageway 10. The insert 9 may be of various sizes, with relation to the axial passageway 10, to accommodate varied sizes of bits.

The bracket 6 is integral with the collar 11 of the cable guide 12. A sleeve 13 is mounted over the opposing end of the cable guide 12 and the cable 16 extends Patented Oct. 31, 1961 through the sleeve 13 and guide 12 and is anchored to the drill connection 14 as by suitable set screws 15, 15.

A slot 17 is formed in the platform 1 between the supports 4, 4 through which the bit 18 and cable 16 extends. A stop 19 is mounted adjacent one of the supports 4, which is tapered at its outside end, and an outwardly extending lip 20 is formed in the platform 1, the stop 19 and lip 20 providing a rest for the member 8 when an extreme angle cut is being made.

On the platform 1, adjacent the supports 4, 4, are the supports 21, 21 to which the externally threaded shaft 22 is pivotally mounted as by the pin 27. An internally threaded rotating member 23 is mounted on the shaft 22. Upstanding on said member 23 is the spike 24, which is pointed at its upper end. A shoulder 25 is provided between the rotating member 23 and the spike 24 on which the bottom end of the extension spike 25 is seated where an extension is needed. The spike 24 is tubular to receive the end of the shaft 22 when in retarded position, and the extension 25 is also tubular so that it will fit over the spike 24.

When it is desired to drill through a plate as 3, the platform 1 is placed on the plate 3 at the desired position, and the rotating member 23 is rotated, raising the spike 24 into contact with the roof 28 and the point of the spike 24 penetrates the material of the roof and causes the prongs 2, 2 to penetrate the plate 3, securely anchoring the platform 1 in position. The bracket 6 is adjusted to the desired angle of penetration and the bolts 7, 7 tight ened to maintain this position. An electric drill may then be attached to the drill connection 14 and the drilling action commenced. As the bit 18 cuts through the plate 3, the sleeve 13 moves the cable 16 through the guide 12. The bend in the guide 12 adjacent the bracket 6 is sufficient to permit the worker to handle the drill and guide away from the juncture of the plate 3 and roof 28 where there is room to work but will still permit adjustment of the bracket 6 to direct various angles of penetration.

The stop 19 is tapered downwardly at its outside end to limit the extreme angle of penetration, but is flat over the rest of its upper surface so that the bracket 6 may be leveled for a straight transverse penetration if desired.

While the foregoing is considered a preferred form of the invention, it is by way of illustration only, the broad principle of the invention being defined by the appended claims.

What I claim is:

1. A plate boring device having an elongated platform, a passageway adjacent one end of and extending through said platform, a bracket mounted on said platform over said passageway, means for adjusting said bracket horizontally and for selectively moving said bracket into an angular position, a tubular cable guide having a portion adapted to extend from said bracket in a plane substantially parallel to said platform, an externally threaded stud mounted to pivot laterally on said platfrom adjacent the other end thereof, internally threaded spike mounted on said stud and an integral external flange on said spike.

2. In a plate boring device, a platform, said platform having a slot through which a drill bit may pass, upstanding supports on said platform, a cable guide bracket adjustably mounted on said supports, means for adjusting said bracket horizontally and for selectively moving said bracket into an angular position, said cable guide bracket having a collar with a vertical cable passageway therethrough and having an annular member internally threaded to receive an insert, said insert being detachably mounted to said annular member and having an axial passageway therethrough in alignment with said cable passageway and a cable guide integrally mounted on said collar and extending upwardly and outwardly therefrom, means for maintaining said platform in position on a plate to be bored comprising upstanding shaft supports on said platform and an externally threaded shaft pivotally mounted on said shaft supports by means of a pin extending through said shaft supports and said shaft, a rotating member internally threaded and mounted on said shaft and a tubular spike on said rotating member.

3. In plate boring device, a platform, said platform having a slot through which a drill bit may pass, upstanding supports on said platform, a cable guide bracket mounted on said supports, means for adjusting said bracket horizontally on said supports and for selectively moving said bracket into an angular position, said cable guide bracket having a collar with a cable passageway therethrough and having an annular member internally threaded to receive an insert, said insert being detach ably mounted to said annular member and having an axial passageway therethrough in alignment with said cable passageway and a cable guide integrally mounted on said collar and extending upwardly and outwardly therefrom, means for maintaining said platform in position on a plate to be bored comprising upstanding shaft supports on said platform and an externally threaded shaft having its lower end pivotally mounted on said shaft supports for the lateral movement of the upper end of said shaft, a rotating member internally threaded and mount ed on said shaft and a tubular spike on said rotating member and means for mounting additional sections of tubular spikes on said rotating member.

4. A plate boring device for boring through plates in a building framework adjacent the roof thereof, an elongated platform, a passageway through said platform, upstanding bracket supportssmounted on said platform embracing said passageway and having longitudinal slots therethrough, a cable guide bracket having one end thereof pivotally mounted in said slots and means for anchoring said bracket at a selected position therein, a collar on said bracket having a vertical cable pasageway therethrough, a bit shank guide mounted in said bracket and a vertical bit passageway therethrough in alignment with said cable passageway in said collar, and a guide for a flexible drill cable leading into said collar and extending upwardly and bent outwardly therefrom on a substantially parallel plane with the horizontal plane of said bracket supports.

References Cited in the file of this patent UNITED STATES PATENTS 534,830 Hoge Feb. 26, 1895 889,273 Thomas June 2, 1908 1,072,328 Goodrich Sept. 2, 1913 1,207,717 Dartt Dec. 12, 1-916 1,269,811 Heritage June 18, 1918 1,470,143 Butterbaugh Oct. 9, 1923 2,402,306 Turkel June 18, 1946 2,417,247 Fuller Mar. 11, 1947 2,903,920 Blecha Sept. 15, 1959 2,958,349 McNutt Nov. 1, 1960 FOREIGN PATENTS 1,093 Great Britain 1897 879,749 France Nov. 30, 1942 

